Improvement in radiators



PATENTBD' 0014, 1870.

ILUJIATOR.`

'EDWARD conan-n, `or PITrsBURG, PENNSYLVANIA.

. LatasV Patent. No. 108,001, daad oapberfi, 1870.

lMsRovElwEur m mom-ross.

'like Schedule referred in these Letters Patentand making parl: of thesame. l

1, EDWARD BOIBNE, -of Pittsburg, in the 'county oi'- Allegheny and Stateof Pennsylvania, have' invented Vcertain Improvements in Radiators, ofwhich the' following is a specification..

" Vllatufre and Objects of-jtlie I iwention.

y This invention relates to an improvement lin thatl class of radiatorsformed 4of two thin metallic sheets, fastened at various points of theirsurface, by rivetsv passing through both."

The invention I' have made consists inso" shaping thesheets, at their'point of Vcontact around the rivets, as thattllat portieri of eachsheet'. will be trans- .verse, or'nenrly se,'to theplane of its surface,form ing in each a'deep conical hole,'that, when brought together,the-cone formed in one sheet will enter andl rest within the conicalportion of the other sheet,

which,` on being clamped between the inside'ot' a washer and a taperingrivet, a greater amount of bear- ,ing will be giveueat this point,Vmaking the sheets doubly stil and secure against leakage, while thecou-1 structionV and arrangement of the partsare such that `the rivetand washer may be easily got at and readily removedhfor repair orotherwise, without danger o changing or aiecting the shape or relativeposi tion of the sheets.`

Description of the Accompanying Drawing. Figure 1 Arepresents asectional view of two thin f metallic sheet-s, .held together by a rivetand washer,

attheir point of. union, in accordance with my plan.

. Figure 2, section of the washer.

Figure 3, section of the upper sheet-.1 Figure 4, sectihn of the lowersheet. Figure 5 represents the rivet. Figure 6, top view ot` the parts.

General Description. l l I take two thin metallic sheets, and punch asmany corresponding holes therein as may' be found necessary, each hole alittle less in diameterthan the rivets to be used.

One of these sheets c is then submitted to the ac? V tion of a pair ofdies, so constructed and operated as to make around each of its severalholes, a deep 'anuular depression, e, leaving4 the center, or that partimmediately around each-hole, standing upward, giving it the shape ofahollow cone, s, and hy which operation the hole is enlarged 'andbrought to the proper i 4size and form.

The other sheet, d, is then, iu like manner, submitted to the action ofa pair of dies, soconstructed as' to simply raise the metal' around eachof its several holes into the shape'of a hollow'ccne, f, the outside .ldiameter of which corresponds with the inside of those,

s, inthe first-described sheet o, so that, when'the two sheets areplaced together, the cones. f in the second 7 'I sheet will enter thosein the first sheet,' as seen in the drawing, ti g. V1.

The rivet b is then ntroduced,and a washer, a, of: Y the exact shape ofthe annular depression e, is placed therein, which, o n'the burring ofthe rivet, clamps the 'conical portion of the sheets together, making ajoint aroundv each rivet superior to any heretofore in nsefor thispurpose..

Althoughl' have' stated that thecones in the.;

second sheet are struck. up by a, pair of' dies, still, if the sheet isthin enough, this striking upis not necessary, as the tapering head ofthe rivet willvaocvomplish that object by drawing the thin metal sheetimmediately around it into that form, by the process. oi'

hammering.

I claiml. So shaping thc sheets, 'at theirV point-ni` contact around therivets,'as'that the cones j', formed in the one.sl1eet,l,'will enter andrest withiu'th'e conical.V portions s of the other sheet, c, andclamping the said 'parts .together by means of washers a and rivets h,

substantially in the manner show n and set forth. .A

2. The annular depression-e, with its corresponding-shaped washer. a,incomhination ,with the cones s and f, arranged and clampedtogether bythe rivet l, substantially in the manner shown and set forth.

1 VIJDWARD BOURNE.

Witnesses:

JosrAH W. ELLs,.- r 'ANDREW HUMBERT.

